Travelers can obtain essential services from the Frontier Airlines office located at St. Louis Lambert International Airport (STL). Ticketing, flight check-ins, baggage queries, and reservation modifications are all supported by this airport-based office. Â Frontier Airlines St. Louis Airport Office budget-conscious passengers will find Frontier's reasonable pricing structure appealing, and the office personnel is happy to help with any queries or concerns they may have about traveling. To guarantee a smoother, stress-free travel experience, especially during peak travel times, passengers are recommended to arrive at the airport early. This will ensure they have ample time to receive help.